Typewriting machine



Oct. 27, 1925.

, J. wALDHElM l-TYPEWMTING MACHINE Filed onus. 1921 completely Patented Oct. 27, 1925.

UNITED STATES` @PATENT oFFlcs.;

JOHN WALDHEIM, or ELIZABETH, NEW JERsEYAssIGNoR`To UNDERWooD TYPE` VTRITER COMPANY, OF NEW-YORK, N. Y., A CORPORATION OF DELAWARE.

TYPEWRIVVTING MACHINE.

lAppucaaon ined octqter 5, 1921. seriai'No. 505,604.

To allk whom it may concern.' Y

Be 1t known that'I, JOHN VVALDHEIM, a

citizen of the United States, residing in Elizabeth, in the county of Union and .State of NewV Jersey, have invented certain new and useful Improvements in Typewriting Machines, of which the following is a specification. 1

This invention relatesto sound-deadening lcases or cabinets for typewriting machines.

It is one feature of this invention to provide a sound-deadening casing which is vsupported upon the machine so that it may readily be transported therewith and which encloses the parts thereof. Tothis end, the casing may comprise a base-plate which is secured to the bottom of the machine frame and a hood which fits' over the machine and is supported on said base-plate. y l y,

A furtherfeature of this invention is the provisionof means whereby the hood can readily be applied to or removed from the machine. 1 y y The hood comprises a body-part and a cover-part hinged to said body-part. It is another feature of this invention to mount the cover-part upon the body-part in Vsuch 'manner as to enable the cover-part to be opened with a minimum of effort. For this purpose, the pivotal aXis of the cover-part is positioned between the forward and rearward edges thereof, so that the weight of said cover-part is distributed to the front and rear of said aXis,-or, in other words, the pivot is approximately under the center of gravity of said cover. l. .f

Afurther feature of this invention is the 1 mounting of the cover-part upon the bodypart in such manner that the forward edge of said cover-part, when the latter is in raised or open position, shall not extend upwardly to such height as to render it inconvenient for the operator to reach the 1 cover-part when it is desired to lower saidl part. For this purpose, the pivotal axis of the cover-phrt is positioned below the upper edges of the body-part so that the forward edge of said cover-part, when the'latter is in raised position, will be 1uositioned correspondingly low. p

Otherfeatures and advantages will hereinafter appear. Y

noise-producing 1 In the accompanying drawings, 'Figure l 1sv a side view,'vert1cally sectioned, of the sound-deadening means applied to an Underwood Standardtypewriting machine.

Figure 2 is a similar view of the sounddeadening means, but detached from the machine, and the base-plate, the cover-part of the hood being in open position.

Figure 3 is a front View, partly sectioned, of the device shown in Figure 1.

The Underwood Standard typewriting machine comprises a main frame 10 supported upon a base by feet 11, said machine having av forward extension 12 in whichgare positioned banks of keys 13, operating typeybars 14 to cause typesl 15, carriedthereby,

to strike against thefront-A of a platen 16' journaled in aplaten-frame 17. ASaid frame forms part of a carriage 2() mounted for yletter-feeding movement .upon 1.a front rail' 21 anda rear rail v22 on the mainV frame. The carriage may be provided with various forwardly-extending operating finger-pieces such as a line-space lever 23. i

For deadening'the sounds arising in the typing operation, there is provided sounddeadening means comprising a base 25 Aand a hood 26 (see Figure 2). .The base 251is in t-he form of a plate which closes the bottom opening of the typewritingmachine, and is securedto the machine preferably between the main frame 10 and the supporting feet 11. For enclosing the Ymachine above the base 25, there is provided the hood 26 consisting of a body-part 30 and a coverpart 31. The hood is open at the bottom, said opening being sufliciently large so that the hood may bemoved downwardlyy over `the typewriting machineV when the typelllO hooks which become eective automatically, or, in other words, snap into holding position as soon as the hood reaches said base while being slid downwardly over the machine. When the hood is to be detached from the base, the hooks 40 are released and the hood lifted upwardly.

For'enclosing the machine at the top, the hood is provided with the cover-part 31 in the 'form of a swing frame having sidewalls 49 extending downwardly below the upper edges ot' theIbody-part and overlapping the `sides ot' thebody-paruvand a 'top wall or ceilinO 42,-said ceiling beingprcterablyprovided with a window 43 togpermit the inachine in the interior of the casing `to be viewed. The cover-part is pivoted on screws or studs 49a. It the pivotal axis oi the coverpart were located at'the rear thereof, the entire weight of theV cover-part wouldhave to be overcome in lifting the cover-part to open position, resulting'in a heavy lifting action. To produce an easy'lit'ting action,the pivotal axis is positioned between the t'orward and rearward edges or" the cover-part, so that the weight of the cover-part is thus distributed to thetront and rear of the pivotal. axis, the greater portionV of the weight ot the cover-part being positioned forwardly of said axis, so that, when said cover-part is lowered, it will remain in lowered position, due to gravity. In other words, with this arrangement, the center-of gravity of the cover is changed 'from one side to the other of a'verticalline through the pivot of the cover and the center of gravity is -lrept'as close as possible' to said line, thus making it easy to swing said cover to open or closed position. The downward movement ot the cover-part may be limited by pins or stops l4''ffixed to the cover-part and engaging the side edges of the body-part, and the upward movement o't' the cover-partmaybe limited by said stops engaging upwardly-extending portions 48 at the rear ot` the body-part. The omer-part terminates at the liront some distance above the front wall 36 of the bodypart, thus 'forming a slot through which various carriage-operating levers, such as the line-space lever 23, extend, to be operable from the outside of the easing. The slotU may be closed by co-opera'ting sound-deadening cushions 44 and 45 fixed to the cover-part and lbody-part, respectively, adjacent the edges of said slot.

`When the cover-part moves to open posiy tion, its forward edge moves rearwardly and upwardly, and, especially whe-re the coverpart has a large front-to-rear dimension, the forward edge' would be raised to such height as to render it inconvenient 'foi-'the operator to reach lit when it is desired to lower the cover-part. The pivotal axis ofthe coverpart is therefore set some distance below the upper edge or the body-part, so that the forward edge of the cover-part rises to a correspondingly lesser height, but sutiicient to clear the machine andthe work-sheets positioned therein. With this arrangement of parts, it is obvious that the rear edge 50 or the cover-part moves away trom theupper rear edge 51 of the body-part when the cover-part is open. To prevent escape or" sound at the meeting edges 50 and 51, when the cover-part is closed, the rear edge 50 overlaps the rear edge 51, and a sound-deadening cushion 52 may be interposed between the overlapping edges and lixed-to one o said edges (here shown as edge 51). Toprevent the leading edge ot' a work-sheet from catching on the upper rearedge 51 ot' the body-part as it is fed from the printing point over the platen and down behind the machine, the cover-part may be provided with a smooth overhanging portion 55 which overlies the upper rear edge of the body-part when the cover-part is in closed position.

VBy inspection of' Figures land 3, it will be seen that the body-part is provided with pockets 60, the sides of which are flush with 4he sides of the casing, and that the cover is pivoted on the headed screws or studs 49a secured tothe sideso'f said pockets. The floors of the-pockets 60 may be formedby lateral extensions 61 at the rear ot the baseplate 25.

'llo-enable the hood to be'placed over the machine, the various linger-pieces on the typewriter-carriage, including the line-space lever 23, may be detachably mounted on the carriage, as shown in my application, No. 466,820, filed May 4, 1921, (now Patent No. 1,519,645, 'lated December 16, 1924), said tinger-piecesbeing Secured to the carriage after the hood has'been placed over themachine.

Vith this arrangement, it will be understood that both the machine and cabinet may readily be attached to a supporting base 65 which may 'form the drop leaf of atypewriter desk. For this purpose, there are provided two `fasten-ing devices 66, herein shown as screws passing upwardly thro-ugh the drop 'leali' and through holes 67L inthe base or floor 25 of the cabinet, said screws being threaded into lugs 68 ot' the typewriter frame 10. Variations may be resorted to within the scope 'of the invention, and portions of the improvements may be used without others. Having thus described l my invention, I claim:

41. A scund-deadening assemblage for a typewriting machine having" a frame and supporting feet therefor, said yassemblage comprising a floor extending between the 'feet and the frame and to the sides and rear of the frame andhaving upstanding ianges at its side and rear edges, the feet extending below the floor, and a casing having overhanging carriage-accommodating sions and being settable down overthe ma-A A rear extending` to extensions and being settable downjover the `machine to rest on said floor in engagement voverhanging carriage-accommodating extensions and being settable down over the machine to rest on said floor in engagement with the sides of said flanges, and springpressed latches on said casing for engaging the floor to secure the casing thereon.

3. A sound-deadening assemblage for a typewriting machine having a frame and supporting feet therefor, said assemblage comprising a iioor extendingV between the feet and the frame and to the sides and rear of the frame and having upstanding flanges at its side and rear edges, the feet extending below the floor, and a casing having ovei'hanging carriage-accommodating extenchine to rest on said floor in engagement Awith the sides of said flanges, the flanges being spaced from the edges of the iioor sufficiently to permit the. lower edge of the casing to Vrestv on the floor outside of'the flanges and be substantially flush with the edges of thefloor.

fl. A sound-deadening assemblage lfor a frame and` typewriting machine having a supporting feet therefor, said assemblage comprising a floor extending between the yfeet and the frame andfto the sides and rear of the frame and having upstanding flanges at its side and rear edges, the feet extending below the floor, a casing'having overliaiiging carriage-accommodating extensions and being settable down over themachine to rest on said floor in engagement with the sides of said flanges, and means for removably securing said casing to said fiooi'.

5. Ak sound-deadening assemblage for a typewriting machine having acarriage coniprising a casing settable down over the machine and having overhanging extensions to accommodate the travel of the carriage, and a papeiaccommodating pocket atV the the bottom of the casing and from end to end of the overhaiiging extensions, and a casing-supporting floor secured to Vthe machine and provided with flanges for positioning said casing and forming, the bottom of the pocket and also forming a closure for the bottom of the typewriting machine.

, 6'. A sound-deadening assemblage for a typewriting machine having a frame with a forwardly-projecting keyboard extension,

feet secured to lthe bottom of the frame, and

a carriage, said assemblage comprising a casing settable down oversaid machine and having a front wall with an opening to receive said keyboardextension, and a cas- Ying-supporting floor secured to the base byk saidfeet and shaped to fit the bottom of ,said casing and having flanges adjacent its edges to extend upwardly inside of the lower edges of the casing to position the latter on the floor, a depressed portion between the feet to avoid iinterferencewith operating parts, anda flange at the forward edge of said. depressed portion extending upwardly VAinto said keyboard extension.l

7. A sound-deadening casing for atypewriting fmachine, comprising a body-part, a cover, means for mounting said 'cover on said body-part, so as to move both the forward and rearward edges ofthe cover away from thefbody-part; a single tubular cushion to prevent the escape of sound between the cover and the body-part at the rear, and Y two tubular cushions to prevent theescape lof sound at the front.'V

,8. A cover for asound-deadening casing for a typewriting machine, comprising side walls having downward extensions for pivotally supporting the cover, a rear wall hav# ing its flower edge considerably above the lower edges of the. sidewalls and curved forwardly'to avoid too great height for the cover, and a window-extending forwardly.

and downwardly from the forward edge vof said rear wall.

9. A sound-deadening casing for a typewriting machine, comprising a body-part settable down over the machine and having overhanging extensions to accommodate the carriage travel, a paper-receivingv pocket .at the rear extending downwardly fromA said extensions and from end to end thereof, and a rear wall extending substantially to the top of the machine, and a coverhaving a top extending from a line substantially at the top of the` machine at its front, rearwardly at a small inclination above the horizontal, to a line slightly to the rear of the center of the machine, and then downwardly around the upper edge of the rear wall of the body-part adjacent its rear face, and side walls having ldownward extensions, so pivoted on the-side walls of said pocket that the cover maybe swung back of the body'- part without causing any part of the cover to `be raised substantially above thelevel of the highest part of the cover' when in closed position. n

10. A sound-deadening casing for a type'-v writing` machine, comprising a body-part settable down over the machine and having a rear wall extending substantially to the top of the machine, and side wallshaving lateral extensions to accommodate the travel of the carriage, pockets extending downwardly from the lateral extensions and outwardly to the ends thereof, and upward projections extending t0 the top of the rear wall, and a cover having a top extending from a. line substantially at the top of the machine at its front, rearwardly at a small inclination above the horizontal, to a lin-e slightly to the rear of the center of the machine, and then downwardly around the upper edge ofthe rear wall ofthe body-part adjacent its ,rear face, side walls having downward extensions, so pivoted on the side walls of said pockets that the cover may be swung back of vthe body-part without causing any part of the cover to be raised substantially abovethe level ofthe highest part of the cover when in closed position, kand pins extending inwardly from the side walls of the cover to engage the lateral `extensions of the side walls to support the cover in closed position and to engage said upward projections to limit the rearward movement of the cover.

. 11. A sounddeadening casing for a typewriting machine, said casing comprising a body-part and a cover-part, said cover-part being pivoted to Said body-part, the pivotal axis of said cover-part beine' positioned between the forward and rearward edges thereof, the rear edge of said cover-part moving away from the upper rear edge lof said body-part when said cover-part is opened, the rear edge of said cover-part overlapping the 4upper rear edge of said body-part in the closed position of the coverpart .to prevent the escape of sound between said parts, i

12. A sound-deadening casing for a typewriting machine, said casing comprising a body-part and a cover-part, said cover-part eing pivoted to said body-part, the pivotal axis of said cover-part being positioned between the forward and rearward edges thereof, the rear edge of said cover-part moving away fromthe upper rear edge of said body-part when said cover-part is opened, the rear edge of said cover-part overlapping kthe upper rear edge of said body-part rin `the closed position of the cover-part, vand sound-deadening means 1ntei-posed between said overlapping edges to prevent the escape of sound between said parts.

13. A sound-deadening .CaSllgfor a typewriting machine, said casing comprising a body-part anda cover-part, said cover-part being pivoted to said body-part, the pivotal axis of said cover-part being` positioned between the forward and rearward edges thereof, the rear edge of said cover-part moving away from the upper rear edge of said body-part when said cover-part is opened, the rear edge'of said cover-part voverlapping the upper rear edge of said body-part in the closed position of the cover-part, and a sound-dea dening cushion 'fixed to one of saidedges and compressed between said overlapping edges to prevent the escape of sound between said parts.

14. A sound-deadening casing for a typewriting machine, said casing comprising a body-part and a cover-part, said cover-part being pivoted to said body-part, the pivotal axisV of said cover-part being positionedbetween the forward and rearward edges thereof, the rear edge of said cover-part moving away from the upper rear edge of said body-part when said cover-part is opened, `the rear edge of said cover-part overlapping the upper rear edgeof said body-part in the closed position of the coverpart, and a sound-deadening cushion fixed to the upper rear edge of said body-part and compressedby the overlapping edge of said cover-part to prevent the escape of sound between said parts.

15. A sound-deadening casingfor a typewriting machine, said casing-comprising a body-part and a cover-part, said cover-part being pivoted to said body-part, the pivotal axis of said cover-part being positioned between the forward and rearward edges thereof, the rear edge of said cover-partmoving away from the upper rear edge of said bodypart when said cover-part yis opened, the rear edge. of said cover-part overlapping the upper rear edge of said body-part in the closed position of the cover-part to prevent the escape. of sound betweensaid parts, and means for preventing the catching of the ends of work-sheets onthe upperyrear edge of the body-part.

16. A sound-deadening casing for a typewriting machine, said casing comprising a body-part and a cover-part, said cover-part beingl pivoted to said body-part, the pivotal axis'of said cover-part being positioned between the forward and rearward edges thereof, the rearA edge of said cover-part moving away from the upper v'rear edge of said body-part when said cover-part is opened, the rear edge of said cover-part overlapping the upper rear edge of said body-part in the closed position of the coverpart to prevent the escape of sound between said parts, and means for preventing the catching .of the ends of work-sheets on the upper rear edge of the body-part, said means comprising a portion fixed to the cover-part and overhanging the Vupper, rear edge ofthe body-part in the closed position ofthe coverpart.

17. A sounddeadening casing for a typewriting machine, said casing comprising a body-part and a cover-part hinged to said body-part, said body-parthaving a rearward projection, and means carried by said cover-part andA engaging said body-part to limit the downward movement of the coverpart, said means engaging the rearward projection of the body-part When the cover-part is opened to limit the upward movement of the cover-part.

18. The combination 0f a typewriting machine, a drop leaf of a desk to support said machine, a sound-deadening casing for said machine, comprising a ioor secured to said machine and having holes therein, and screws passing through said drop' leaf through the holes in the floor of said casing and threaded into the frame of said machine to hold said machine and casing on said c lgop leaf. Y

19. The combination of atypewriting machine having a main frame,r supporting feet secured to the main frame, a sound-deadening casing for said machine, said casing comprising a hood to t over the machine and 20 a floor introduced between the bottom of the on said main frame, a sound-deadening casing for said machine, said casing comprising a hood to fit over the machine and a floor introduced between the bottom of the frame and the feet of the machine, said floor having holes therein, a supporting base, forming the drop leaf of a desk, to be engaged by said feet, screws passing thro-ugh the drop leaf and through the holes in said floor and threaded into said frame to hold said machine on said drop leaf, and releasable latches to hold the hood on its Hoor.

JOHN VALD'HEIM. 

